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E3T-[]-UL

Ultracompact, Ultrathin Photoelectric Sensor with Built-in Amplifier

E3T-[]-UL

The lineup has been expanded to E3T series with UL certified products

Item list of E3T-[]-UL

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last update: January 5, 2026

Sensors

M2-mounting Sensors

A set of mounting screws is included with the Sensor.

Sensing method Appearance Sensing distance
(Red light)		 Operation mode Model
NPN output PNP output
Through-beam
(Emitter
+
Receiver)		 3954_lu_1_1 2 m (Red light)
(Sensitivity Adjustment
Unit can be used.)		 Light-ON E3T-ST31-UL 2M E3T-ST33-UL 2M
Dark-ON E3T-ST32-UL 2M E3T-ST34-UL 2M
1 m (Red light)
(Sensitivity Adjustment
Unit can be used.)		 Light-ON E3T-ST11-UL 2M E3T-ST13-UL 2M
Dark-ON E3T-ST12-UL 2M E3T-ST14-UL 2M
300 mm (Red light) Light-ON E3T-ST21-UL 2M E3T-ST23-UL 2M
Dark-ON E3T-ST22-UL 2M E3T-ST24-UL 2M
3954_lu_1_2 500 mm (Red light) Light-ON E3T-FT11-UL 2M E3T-FT13-UL 2M
Dark-ON E3T-FT12-UL 2M E3T-FT14-UL 2M
300 mm (Red light) Light-ON E3T-FT21-UL 2M E3T-FT23-UL 2M
Dark-ON E3T-FT22-UL 2M E3T-FT24-UL 2M
Retroreflective 3954_lu_1_3 Using the E39-R4
Reflector provided
200 mm (30 mm) *1
Using the E39-R37-CA
100 mm (10 mm) *1
(Red light)		 Light-ON E3T-SR41-UL 2M E3T-SR43-UL 2M
Dark-ON E3T-SR42-UL 2M E3T-SR44-UL 2M
Diffusereflective 3954_lu_1_4 5 to 30 mm (Red light) Light-ON E3T-FD11-UL 2M E3T-FD13-UL 2M
Dark-ON E3T-FD12-UL 2M E3T-FD14-UL 2M
Limitedreflective 3954_lu_1_5 5 to 15 mm (Red light) Light-ON E3T-SL11-UL 2M E3T-SL13-UL 2M
Dark-ON E3T-SL12-UL 2M E3T-SL14-UL 2M
5 to 30 mm (Red light) Light-ON E3T-SL21-UL 2M E3T-SL23-UL 2M
Dark-ON E3T-SL22-UL 2M E3T-SL24-UL 2M
BGS reflective 3954_lu_1_6 1 to 15 mm (Red light) Light-ON E3T-FL11-UL 2M E3T-FL13-UL 2M
Dark-ON E3T-FL12-UL 2M E3T-FL14-UL 2M
1 to 30 mm (Red light) Light-ON E3T-FL21-UL 2M E3T-FL23-UL 2M
Dark-ON E3T-FL22-UL 2M E3T-FL24-UL 2M

M3-mounting Sensors

A set of mounting screws is not included with the Sensor. Order a Screw Set separately if required.

Sensing method Appearance Sensing distance
(Red light)		 Operation mode Model
NPN output PNP output
Through-beam
(Emitter
+
Receiver)		 3954_lu_2_1 1 m
(Red light)		 Light-ON E3T-ST11M-UL 2M E3T-ST13M-UL 2M
Dark-ON E3T-ST12M-UL 2M E3T-ST14M-UL 2M
300 mm
(Red light)		 Light-ON E3T-ST21M-UL 2M E3T-ST23M-UL 2M
Dark-ON E3T-ST22M-UL 2M E3T-ST24M-UL 2M
Diffusereflective 3954_lu_2_2 5 to 30 mm
(Red light)		 Light-ON E3T-FD11M-UL 2M E3T-FD13M-UL 2M
Dark-ON E3T-FD12M-UL 2M E3T-FD14M-UL 2M

*1. Values in parentheses indicate the minimum required distance between the Sensor and Reflector.

Accessories (Order Separately)

Accessories for M2-mounting Sensors

These accessories are not included with the Sensor. Order them separately if required.

Name Applicable Sensor Model Quantity Remarks
Slit for
Through-
beam
Side-view
Sensors		 0.5 dia. E3T-ST3[][] E39-S63 2
(One each for
Emitter and
Receiver;
common with
Slit widths
of 1 dia.
and 0.5 dia.)		 Sensing distance 200 mm,
Minimum detectable object
(reference value) 0.5-mm dia.
E3T-ST1[][] Sensing distance 100 mm,
Minimum detectable object
(reference value) 0.5-mm dia.
E3T-ST2[][] Sensing distance 30 mm,
Minimum detectable object
(reference value) 0.5-mm dia.
1 dia. E3T-ST3[][] Sensing distance 600 mm,
Minimum detectable object
(reference value) 1-mm dia.
E3T-ST1[][] Sensing distance 300 mm,
Minimum detectable object
(reference value) 1-mm dia.
E3T-ST2[][] Sensing distance 100 mm,
Minimum detectable object
(reference value) 1-mm dia.
Slit for
Through-
beam
Flat
Sensors		 0.5 dia. E3T-FT1[][] E39-S64 Sensing distance 50 mm,
Minimum detectable object
(reference value) 0.5-mm dia.
E3T-FT2[][] Sensing distance 30 mm,
Minimum detectable object
(reference value) 0.5-mm dia.
1 dia. E3T-FT1[][] Sensing distance 100 mm,
Minimum detectable object
(reference value) 1-mm dia.
E3T-FT2[][] Sensing distance 50 mm,
Minimum detectable object
(reference value) 1-mm dia.
Sensitivity
Adjustment Unit
for Through-beam
Side-view Sensors
with Red Light		 E3T-ST3[] E39-E10 1 Sensing distance
(reference value)
1,200 to 1,800 mm
E3T-ST1[] Sensing distance
(reference value)
300 to 800 mm
Mounting Brackets
for Side-view
Sensors *1		 E3T-S[][][][] E39-L116 1 Nut plate provided
E39-L117
E39-L118
Mounting Brackets
for Flat Sensors *1		 E3T-F[][][][] E39-L119 ---
E39-L120
Screw Set
for Side-view
Sensors *2 *3		 E3T-S[][][][] E39-L164 2 for each Material: Iron (Same type as
provided with the Sensor.)
Contents: Set screws
(M2×14), Hexagonal nuts
Screw Set
for Flat Sensors
*2 *3		 E3T-F[][][][] E39-L165 Material: Iron (Same type as
provided with the Sensor.)
Contents: Set screws (M2×8),
Hexagonal nuts
SUS Screw Set
for Flat Sensors
*2		 E3T-F[][][][] E39-L172 2 Material: SUS304
Contents: Bolt with hexagonal
hole (M2×6)
SUS Screw Set
for Side-view
Sensors *2		 E3T-S[][][][] E39-L173 2 for each Material: SUS304
Contents: Bolt with hexagonal
hole (M2×12), Hexagonal nuts,
Spring washers, Flat washers

*1. When using Through-beam Sensors (E3T-ST[][], E3T-FT[][]), order one Bracket for the Emitter and one for the Receiver.
*2. Order two Sets, one for the Emitter and one for the Receiver, for Through-beam Sensors (E3T-ST[][] or E3T-FT[][]).
This is the Screw Set for mounting the Sensor to the Mounting Bracket.
Order this Set if you lose the screws. Do not use this Screw Set to mount the Mounting Bracket to the equipment.
*3. This is included with the Sensor. Order this Set if you lose the screws.

Accessories for M3-mounting Sensors

These accessories are not included with the Sensor. Order them separately if required.

Name Applicable
Sensor		 Model Quantity Remarks
Slit for
Through-beam
Side-view Sensors		 0.5 dia. E3T-ST1[]M E39-S76A 2
(One each
for Emitter
and
Receiver)		 Sensing distance 100 mm,
Minimum detectable object
(reference value) 0.5-mm dia.
E3T-ST2[]M Sensing distance 30 mm,
Minimum detectable object
(reference value) 0.5-mm dia.
1 dia. E3T-ST1[]M E39-S76B Sensing distance 300 mm,
Minimum detectable object
(reference value) 1-mm dia.
E3T-ST2[]M Sensing distance 100 mm,
Minimum detectable object
(reference value) 1-mm dia.
Mounting Brackets
for Side-view Sensors *1		 E3T-ST[][]M E39-L166 1 Nut plate provided
Mounting Bracket
for Flat Sensors		 E3T-FD[][]M E39-L167 ---
Back-mounting Spacer
for Flat Sensors		 E3T-FD[][]M E39-L168 1 Use this Spacer when mounting
a Flat Sensor (E3T-FD[][]M) from
the back.
SUS Screw Set
for Side-view Sensors *2 *3		 E3T-ST[][]M E39-L171 2 for each Material: SUS304
Contents: Bolt with hexagonal hole
(M3×15), Hexagonal nuts, Spring
washers, Flat washers

*1. Order one Bracket for the Emitter and one for the Receiver.
*2. This is the Screw Set for mounting the Sensor to the Mounting Bracket. Order this Set if you lose the screws. Do not use this Screw Set to mount the Mounting Bracket to the equipment.
*3. Order two Sets, one for the Emitter and one for the Receiver.

Reflectors

(Reflector required for Retroreflective Sensors)
A Reflector is not provided with the Sensor. Be sure to order a Reflector separately.

Name Applicable
Sensor		 Model Quantity Remarks
Small Reflectors E3T-SR4[] E39-R4 *3 1 Sensing distance 200 mm (30 mm) *1
Minimum detectable object 2-mm dia.
E39-R37-CA *2 Sensing distance 100 mm (10 mm) *1
Minimum detectable object 2-mm dia.
Tape Reflectors E39-RS1-CA *2 Sensing distance 100 mm (10 mm) *1
Minimum detectable object 2-mm dia.
E39-RS2-CA *2
E39-RS3-CA *2

*1. Values in parentheses indicate the minimum required distance between the Sensor and Reflector.
*2. The E3T-SR4[] cannot be used with the E39-R37 or E39-RS1/2/3 (without CA) Tape Reflectors. The E39-[]-CA Reflector is for use only with the E3T-SR4[]. It cannot be used with other Sensors.
*3. This is included with the Sensor. Order if you lose the Small Reflector.

last update: January 5, 2026

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